Electric cylinder



FIG. 1 is a top, front, perspective view of an electric cylinder showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof.

FIG. 8 is a top, back, perspective view showing the electric cylinder; and,

FIG. 9 is a bottom, front, perspective view showing the electric cylinder. 

The ornamental design for an electric cylinder, as shown and described. 